Valve for automobile-tires.



C. R. C. BORDEN.

VALVE FOR AUTOMOBILE TIRES.

APPLICATION FILED 11110.14, 1911,

CHARLES B.. Ci' BORDEN, ,OF BROOKLINE,MASSACHUSETTS.

VALVE-'ron AUTOMOBILE-Tinne.

Specification of Letters Patent.

Application filed December"l 14, 1911. Serial No. 665,612.

T o all whom it may concern: l

Be it known that I, CHARLES R. C. BOR- DEN, a citizen of the United States, residing at Brookline, county of Norfolk, Commonwealth of Massachusetts, have invented certain new and useful Improvements in Valves for Automobile-Tires, of which the follow-.-`

ing is a specification.

This invention relates to valves and par- `ticularly to a valve for controlling the inlation of a pneumatic automobile tire. In valves of this nature much ditticulty has been experienced in devising controlling means sufficiently sensitive to yield readily to the action of the pump and yet suliiciently strong to withstand the varying pressure of the tire under the extreme conditions of temperature and road. A great deal of difficulty has arisen from a so called slow leak, by which the tire becomes gradually deflated so that without -becoming suticiently soft to attract the not-ice of they vide a valve structure permitting inflatiorn even by a light hand pump and yet being capable of a setting after inilation-Which will absolutely insure the retention ofthe tire pressure. To this end, I have devised a combination valve affording possibilities of construction by which these results may be accomplished within the usual stem, which hasbeen a opted as a common type and convenient st ndard.

In the specification which follows, I shall disclose the form of my invention which I find well adapted to practical use as conformable to accepted types of equipment. This form I have illustrated inthe drawings which form a part of the specification. Throughout specification and drawings like rference numerals are ,employed to indicate corresponding parts and in the drawings: y

Figure 1 is a central vertical section through the valve stem showing .also the `inner tube of the tire. Fig. 2 is an enlarged detail of a portion of the valve stem lshowing the valve construction, and Fig. 3 is a plan view of the stern showingl the stem end with the cap removed. f

I have indicated at 1 the usual inner tire tube attached to a tem 2r1 0f the 11Sualex`- ternal appearance. On the upper end of the .stem 2 is a threaded sleeve 3 for compressing a packing 4. which surrounds a needle v alve 5. The valve 5 has near its top a portion 6 which is facedAott for the engagement of a wrench, and terminating at its upper end in an externally threaded portion 7, adapted to receive an internally threaded portion 8v of the usual valve cap 9. This valve cap 9 is-provided with an extension 10 having a slotted, spanner end 10 recessed l`Within the upper end of the needle valve 5 which is counterbored to receive it, I place a check valve comprising an externally threaded plug 12 in which a valve member 13 provided with a rubber packing 14is loosely mounted. The valve member 13 is longitudinally bored to receive a guiding stem 16 about which the spring 18 is coiled. A block 17 bears against the end of the spring 18 and against the lower side of the valve 13. The lower end of the spring 18 is supported by an inverted cup 19 through which the stem 16 passes. The cup is notched at 20 for the passage of the air. The valve 13 seats upon a conical shoulder formed in the counterbore of the end 7 of the needle valve.l The central passage 21 of the needle valve is connected with an opening 23 which passes through the conical lower end of the needle'valve 5. Thisconical end of the needle valve seats against a beveled shoulder 22 which is arranged just above t-he longitudinal passage 24 of the stern 2 In `use the valve is employed as follows: When it is desired to inflate the tire 1 the ca 10 is first'unscrewed, the needle valve 5 1s opened by turning the faced oportion 6,- the pump connection is made with the end l7 and the valve infiated at the pressure de` sired. During this pumping action the removed and the cap 10 is returned to its position as shown in Fig. 1. When the tire is inflated, therefore, the pressure from the tire is carried by the pointed end of the needle valve 5 thus removing a strain from the 'light check valve 13 which is located abile Y f Patenten Deel s, wie.-

When it is desired to replace the l'fcheck valve 13 the change may be made without losing the pressure of the tire. The entire needle valve, carrying the check valve with it, maybe removed at any time for the adjustment of parts or the replacing of the the use and construction of the needle`valve,

all without departing from the spirit of my invention if lwithin the limits of the appended claims.

What I, therefore, claim and desire to secure by Letters Patent is 1. An inflation valve comprising a stem having a longitudinal bore, a seat within said bore, a hollow spindle open at its outer end in said bore, a valve on said spindle and adapted to coact with said seat, a check valve removably lod ed within the open end of. said hollow splndle, the-open outer. end ol said hollow spindle being of size to permit access to said hollow spindle for the insertion or removal of said check valve.

2. An inflation valve comprising a stem having a longitudinal bore, an outwardly disposed seat within said bore, a hollow spindle open at its outer end in said bore, a

valve on the end of said spindle, means for moving said spindle to seat said valve, a check valve removably lodged within the open end of said hollow spindle, the openutermend of said hollow spindle being of size to permit access to said hollow spindle for the insertion or removal of said check valve.

3. An inflation valve comprising a stem having a longitudinal bore, a seat within said bore, said bore being enlarged above said seatfor a packing, a shouldered gland threaded into saidenlargement to compress said packing and having said shoulder overlying said stem end but not extending outside thereof, a hollow spindle open atits outer end in said bore, and extending through said gland, and having a shoulder overlyingsaid gland shoulder but not extending outside thereof, and a check valve removably lodged within the open end of said spindle, the said open outer end of said.

hollow spindle being of size to permit access to said hollow spindle for the insertion or removal of said check valve.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES R. C. BORDEN.

Witnesses: v

R. B. ELLMS, V. LowDEN. 

